where \(\mapsto \)  denotes the discrete projection and \(P(v)\)  is the part label of vertex \(v\)  defined in DensePose [1]}. We define the front part \(p^*(x,y)\)  by finding the vertex with highest z-axis visibility score \(s^z\)  as:
\(p^*(x,y) = P \Big (\operatornamewithlimits{arg\,max}_{v\mapsto (x,y)} {s_v}^z \Big ) .\) 
